Check out John Wilson's website:
Flyfishingarkansas.com
There is a Taneycomo/Missouri forum, I believe.
One angler, "Nightstalker", posts regularly and specializes in streamers up by the dam(s) of Taney for some large trout--I believe he's even started a night fishing guide service. I've seen some photos from a fisherman I met who had caught some absolute hogs there at night in the fall....10lbs+.
Good Luck,
Travis